Geotechnical properties of the Bauru sandstone, Sao Paulo, Brazil

The various geotechnical characterization of very weak sedimentary rock including determination of the state of initial stress thereof were carried out with the purpose of designing excavated slopes for the Pereira Barreto Canal. The uniaxial compressive strength was selected as a property index which enabled the establishment of a criterium of rock classification as well as relationships with shear strengths, deformability and permeability.